Alloy



UNITED STATES PATENT OFFIQE...

ALLOY.

Specification of Letters Patent.

Patented Apr. 26, 1921.

N0 Drawing. Original application filed June 7, 1820, Serial No. 387,218. Divided and this application filed July 1%, 1920.

To all to 7mm it may concern:

Be it known that I, COLUMBUS D. Srovnnn, a citizen of the United States, residing at Lexington, in the county of Fayette and State of Kentucky, have invented certain new and useful Improvements in Alloys, the same being a division of my pending application, Serial No. 387,218,1Tiled June 7,1920, of which the following is a specification.

This invention relates to certain improvements in alloys and has relation more par ticularly to an alloy especially designed and adapted for use in connection with dentistry, and it is an object of the invention to provide a novel and improved alloy which is substantially non-oxidizable and which is hard, elastic and tenacious.

It is also an object of the invention to provide a novel and improved alloy which is of a good golden color and which is highiusing.

My improved alloy comprises the following ingredients mixed in substantially the proportions given:

Gold 72 grains.

Nickel 18% grains. Copper 16!; grains.

Serial No. 396,081.

The nickel and copper when combined with the remaining constituents, results in a convenient product of a good golden color and an elastic, rigid, hard, high-fusing, tenacious metal, and in practice the resultant mass is preferably made into plates rolled to the desired thickness.

It has been fully established in practice that my improved alloy is substantially nonoxidizable and is particularly adapted for use in connection with dentistry as the alloy will not discolor and is not affected by ordinary acids. It has also been fully established that annealing does not affect the elasticity or tenacity of my improved alloy.

l claim:

An alloy comprising in substantially the proportions given gold 72 grains, nickel 13,; grains, and copper 16% grains.

In testimony whereof I hereunto affix my signature.

COLUMBUS D. STOVALL. 

